High-sealing platinum resistor temperature sensor

Abstract

The high-sealing platinum resistor temperature sensor comprises a junction box, an extension tube is fixedly installed on the outer surface of the lower end of the junction box, a protection tube is fixedly installed on the outer surface of the lower end of the extension tube, a flange plate is fixedly installed on the outer wall of the lower portion of the junction box, and an installation hole is formed in the outer surface of the upper end of the flange plate. A pre-tightening force assembly is arranged on the upper portion of the mounting hole and comprises an annular mounting groove, a compression spring and a ring body. According to the high-sealing platinum resistor temperature sensor, the rubber ring is arranged, the protrusions are arranged on the outer surface of the lower end of the rubber ring, the protrusions can increase local pressure between the rubber ring and the contact surface, filling of tiny gaps is facilitated, the protrusions can better adapt to unevenness of the contact surface, more uniform sealing is ensured, and the temperature sensor is more stable in performance. And the pre-tightening force assembly is arranged, so that the pre-tightening force is conveniently provided during installation, and the bolt is prevented from loosening due to thermal expansion or vibration.

Description

Technical Field

[0001] This utility model relates to the field of platinum resistance temperature sensor technology, specifically a high-sealing platinum resistance temperature sensor. Background Technology

[0002] A platinum resistance temperature sensor (RTD) is a sensor that measures temperature by utilizing the property that platinum resistance changes with temperature. Its core component is a platinum wire or a platinum film. Common models are Pt100 and Pt1000, which indicate a resistance of 100 ohms and 1000 ohms at 0°C, respectively.

[0003] However, existing platinum resistance temperature sensors have some shortcomings in terms of sealing and installation stability. First, traditional sealing structures typically use a single rubber ring or gasket for sealing. This structure often fails to achieve a uniform sealing effect when the contact surface is uneven or has tiny gaps, which can easily lead to leakage or external contaminants entering the sensor, affecting measurement accuracy and the sensor's lifespan. Second, existing installation methods mostly rely on bolt fixing, but in high-temperature or vibration environments, bolts are prone to loosening due to thermal expansion or vibration, resulting in unstable sensor installation and consequently affecting the accuracy and reliability of measurements.

[0004] Therefore, we propose a high-sealing platinum resistance temperature sensor. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a high-sealing platinum resistance temperature sensor. By improving the sealing structure and adding a pre-tightening component, this invention can effectively improve the sealing performance of the sensor and provide continuous pre-tightening force during installation, preventing bolts from loosening due to thermal expansion or vibration. This ensures the stability and reliability of the sensor under various environments and effectively solves the problems in the background technology.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-sealing platinum resistance temperature sensor, comprising a junction box, an extension tube fixedly installed on the lower outer surface of the junction box, a protective tube fixedly installed on the lower outer surface of the extension tube, a flange fixedly installed on the lower outer wall of the junction box, a mounting hole opened on the upper outer surface of the flange, a pre-tightening force assembly provided on the upper part of the mounting hole, the pre-tightening force assembly comprising an annular mounting groove, a compression spring and a ring body, an annular limiting groove opened on the lower outer surface of the flange, a rubber ring installed on the lower part of the annular limiting groove, a protrusion provided on the lower outer surface of the rubber ring, and a bolt passing through the mounting hole.

[0009] Preferably, the outer wall of the upper part of the rubber ring is inserted into the annular limiting groove.

[0010] Preferably, the annular mounting groove is formed on the upper outer surface of the flange.

[0011] Preferably, the compression spring is located in the annular mounting groove, the lower outer surface of the compression spring is fixedly connected to the bottom of the annular mounting groove, and the upper outer surface of the compression spring is fixedly connected to the lower outer surface of the ring.

[0012] Preferably, the outer wall of the ring body is slidably connected to the annular mounting groove, and the lower outer surface of the ring body is elastically connected to the bottom of the annular mounting groove by a compression spring.

[0013] Preferably, the bolt passes through the preload assembly.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a high-sealing platinum resistance temperature sensor, which has the following advantages:

[0016] 1. This high-sealing platinum resistance temperature sensor features a rubber ring with protrusions on the lower outer surface. These protrusions increase the local pressure between the rubber ring and the contact surface, helping to fill tiny gaps. Multiple protrusions can better adapt to unevenness in the contact surface, ensuring a more uniform seal.

[0017] 2. This high-sealing platinum resistance temperature sensor is equipped with a pre-tightening component, which facilitates the provision of pre-tightening force during installation and prevents bolts from loosening due to thermal expansion or vibration. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a high-sealing platinum resistance temperature sensor according to the present invention.

[0019] Figure 2 This is a side cross-sectional view of the flange in a high-sealing platinum resistance temperature sensor according to this utility model.

[0020] Figure 3 This utility model relates to a high-sealing platinum resistance temperature sensor. Figure 2 Enlarged view of point A in the middle.

[0021] Figure 4 This is a schematic diagram of the flange structure in a high-sealing platinum resistance temperature sensor according to this utility model.

[0022] In the diagram: 1. Junction box; 2. Extension tube; 3. Protective tube; 4. Flange; 5. Preload assembly; 6. Bolt; 7. Rubber ring; 8. Mounting hole; 9. Annular limiting groove; 10. Protrusion; 11. Annular mounting groove; 12. Compression spring; 13. Ring body. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] This embodiment is a high-sealing platinum resistance temperature sensor.

[0025] like Figure 1-4 As shown, the device includes a junction box 1. An extension tube 2 is fixedly installed on the lower outer surface of the junction box 1. A protective tube 3 is fixedly installed on the lower outer surface of the extension tube 2. A flange 4 is fixedly installed on the lower outer wall of the junction box 1. A mounting hole 8 is opened on the upper outer surface of the flange 4. A pre-tightening component 5 is provided on the upper part of the mounting hole 8. The pre-tightening component 5 includes an annular mounting groove 11, a compression spring 12, and a ring 13. An annular limiting groove 9 is opened on the lower outer surface of the flange 4. A rubber ring 7 is installed on the lower part of the annular limiting groove 9. A protrusion 10 is provided on the lower outer surface of the rubber ring 7. A bolt 6 passes through the mounting hole 8.

[0026] The upper outer wall of the rubber ring 7 is inserted into the annular limiting groove 9; the annular mounting groove 11 is opened on the upper outer surface of the flange 4; the compression spring 12 is located in the annular mounting groove 11, the lower outer surface of the compression spring 12 is fixedly connected to the bottom of the annular mounting groove 11, and the upper outer surface of the compression spring 12 is fixedly connected to the lower outer surface of the ring body 13; the outer wall of the ring body 13 is slidably connected to the annular mounting groove 11, and the lower outer surface of the ring body 13 is elastically connected to the bottom of the annular mounting groove 11 through the compression spring 12; the bolt 6 passes through the preload assembly 5.

[0027] It should be noted that this utility model is a high-sealing platinum resistance temperature sensor. The junction box 1, extension tube 2, and protective tube 3 described in this document are all existing technologies and belong to the composition structure of a platinum resistance temperature sensor. These components are readily known to those skilled in the art and will not be elaborated further. The rubber ring 7 is provided, with its upper part confined in the annular limiting groove 9 to improve its stability. A protrusion 10 is provided on the lower outer surface of the rubber ring 7, which increases the local pressure between the rubber ring 7 and the contact surface, thus aiding in... To fill tiny gaps, multiple protrusions can better adapt to unevenness of the contact surface, ensuring a more uniform seal. Through the pre-tightening force component 5, when installing the bolt 6, the nut on the upper part of the bolt 6 squeezes the ring 13, squeezing the ring 13 into the annular mounting groove 11. The ring 13 squeezes the compression spring 12 in the annular mounting groove 11, so that the compression spring 12 always has a restoring force after installation, providing pre-tightening force after installation, preventing the bolt 6 from loosening due to thermal expansion or vibration, further improving safety and stability, thereby improving the sealing performance.

[0028] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-sealing platinum resistance temperature sensor, comprising a junction box (1), wherein an extension tube (2) is fixedly mounted on the lower outer surface of the junction box (1), and a protective tube (3) is fixedly mounted on the lower outer surface of the extension tube (2), characterized in that: A flange (4) is fixedly installed on the outer wall of the lower part of the junction box (1). An installation hole (8) is opened on the upper outer surface of the flange (4). A pre-tightening force assembly (5) is provided on the upper part of the installation hole (8). The pre-tightening force assembly (5) includes an annular mounting groove (11), a compression spring (12) and a ring (13). An annular limiting groove (9) is opened on the lower outer surface of the flange (4). A rubber ring (7) is installed on the lower part of the annular limiting groove (9). A protrusion (10) is provided on the lower outer surface of the rubber ring (7). A bolt (6) passes through the installation hole (8).

2. The high-sealing platinum resistance temperature sensor according to claim 1, characterized in that: The outer wall of the upper part of the rubber ring (7) is inserted into the annular limiting groove (9).

3. The high-sealing platinum resistance temperature sensor according to claim 2, characterized in that: The annular mounting groove (11) is formed on the upper outer surface of the flange (4).

4. The high-sealing platinum resistance temperature sensor according to claim 3, characterized in that: The compression spring (12) is located in the annular mounting groove (11). The lower outer surface of the compression spring (12) is fixedly connected to the bottom of the annular mounting groove (11), and the upper outer surface of the compression spring (12) is fixedly connected to the lower outer surface of the ring (13).

5. A high-sealing platinum resistance temperature sensor according to claim 4, characterized in that: The outer wall of the ring (13) is slidably connected to the annular mounting groove (11), and the lower outer surface of the ring (13) is elastically connected to the bottom of the annular mounting groove (11) through a compression spring (12).

6. The high-sealing platinum resistance temperature sensor according to claim 5, characterized in that: The bolt (6) passes through the preload assembly (5).

Images